SaaS Metrics

Monthly recurring revenue (MRR) is the predictable, normalised revenue a subscription business earns each month. It is the single most important metric for understanding the health and trajectory of a SaaS company because it captures new sales, expansion, contraction, and churn in one number.

Annual recurring revenue (ARR) is the annualised value of a company's recurring subscription revenue. It is the primary metric used to measure the scale and growth trajectory of SaaS businesses, and it directly drives enterprise valuations.

Average revenue per user (ARPU) measures the mean revenue generated per user or account over a given period. It is a critical metric for understanding monetisation efficiency and for connecting pricing strategy to revenue outcomes.

CAC payback period measures the number of months it takes for a customer to generate enough gross profit to recoup the cost of acquiring them. It is a critical measure of capital efficiency and cash flow health in subscription businesses.

The LTV:CAC ratio compares the lifetime value of a customer to the cost of acquiring them. It is the most fundamental measure of unit economics and determines whether a business can grow profitably.

The Rule of 40 states that a healthy SaaS company's combined revenue growth rate and profit margin should equal or exceed 40%. It balances the tension between growth and profitability, providing a single benchmark for overall business health.

The SaaS magic number measures how efficiently a company converts sales and marketing spend into new recurring revenue. It answers the question: for every pound invested in go-to-market, how much new annualised revenue does the business generate?

The SaaS quick ratio measures the efficiency of MRR growth by comparing revenue gained (new + expansion) to revenue lost (churned + contraction). A high quick ratio means the business is growing efficiently without relying on brute-force acquisition to outrun churn.

Expansion revenue is the additional recurring revenue generated from existing customers through upsells, cross-sells, add-ons, and usage growth. It is the most capital-efficient source of growth because it requires no acquisition cost.

Burn rate measures how quickly a company spends its cash reserves. It is the most critical survival metric for startups and growth-stage companies, directly determining how long the business can operate before it needs additional funding or reaches profitability.

Cash runway is the number of months a company can continue operating at its current burn rate before running out of cash. It is the most direct measure of a startup's survival timeline.

Activation rate measures the percentage of new sign-ups who complete a key action that signals they have experienced the core value of the product. It is the bridge between acquisition and retention, and a leading indicator of long-term customer health.

Logo retention rate measures the percentage of customers (logos) retained over a given period, regardless of the revenue they generate. It provides a pure measure of customer satisfaction and product stickiness that is not distorted by revenue changes.

Customer acquisition cost (CAC) is the total cost of acquiring a new customer, including all sales and marketing expenses divided by the number of new customers gained in a given period. It is one of the most important unit economics metrics for any growth-stage business.

Customer lifetime value (CLV) is the total revenue a business can expect from a single customer account over the entire duration of their relationship. It quantifies the long-term financial worth of acquiring and retaining a customer, making it one of the most important metrics for sustainable growth.

Churn rate measures the percentage of customers or subscribers who stop using a product or service during a given time period. It is the most direct indicator of whether a business is delivering enough ongoing value to retain its customer base, and it has a compounding effect on growth, revenue, and customer lifetime value.

Completion rate measures the percentage of users who finish a defined process or onboarding flow from start to end. It is a direct indicator of how well a product guides users through critical workflows, and a leading signal of activation, retention, and downstream conversion.

Gross MRR churn rate measures the percentage of monthly recurring revenue lost to cancellations and downgrades in a given period. It isolates the revenue damage from customer losses before any offsetting expansion, providing the clearest view of how much revenue the business is haemorrhaging each month.

MRR closed vs quota measures the actual monthly recurring revenue closed by a sales team or rep as a percentage of their assigned quota. It is the definitive measure of sales execution against plan, connecting individual and team output directly to the revenue targets that drive business growth.

Net MRR churn rate measures the monthly recurring revenue lost to cancellations and downgrades minus the expansion revenue gained from existing customers, expressed as a percentage of starting MRR. It reveals whether the existing customer base is shrinking or growing in value each month.

Net MRR growth rate measures the month-over-month percentage change in net monthly recurring revenue. It captures the combined effect of new customer acquisition, expansion, contraction, and churn in a single number, making it the most comprehensive measure of SaaS revenue momentum.

Signup to subscriber conversion rate measures the percentage of free signups who convert to a paid subscription. It is the critical bridge between acquisition and revenue in product-led growth models, determining how effectively a business monetises its user base.